/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:31:56,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:31:56,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:31:56,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:31:56,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:31:56,345 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:31:56,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:31:56,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:31:56,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:31:56,349 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:31:56,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:31:56,349 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:31:56,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:31:56,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:31:56,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:31:56,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:31:56,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:31:56,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:31:56,352 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:31:56,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:31:56,352 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:31:56,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:31:56,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:31:56,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:31:56,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:31:56,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:31:56,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:31:56,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:31:56,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:31:56,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:31:56,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:31:56,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:31:56,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:31:56,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:31:56,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:31:56,628 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:31:56,632 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:31:56,633 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:31:56,633 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:31:56,634 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label53.c [2019-11-06 22:31:56,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56e995535/8b8458d579cf4ca0802d06402d9c152b/FLAGa8016aac3 [2019-11-06 22:31:57,251 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:31:57,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label53.c [2019-11-06 22:31:57,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56e995535/8b8458d579cf4ca0802d06402d9c152b/FLAGa8016aac3 [2019-11-06 22:31:57,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56e995535/8b8458d579cf4ca0802d06402d9c152b [2019-11-06 22:31:57,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:31:57,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:31:57,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:57,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:31:57,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:31:57,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:57" (1/1) ... [2019-11-06 22:31:57,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d482f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:57, skipping insertion in model container [2019-11-06 22:31:57,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:57" (1/1) ... [2019-11-06 22:31:57,532 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:31:57,592 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:31:58,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:58,209 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:31:58,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:58,307 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:31:58,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58 WrapperNode [2019-11-06 22:31:58,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:58,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:31:58,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:31:58,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:31:58,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (1/1) ... [2019-11-06 22:31:58,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (1/1) ... [2019-11-06 22:31:58,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (1/1) ... [2019-11-06 22:31:58,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (1/1) ... [2019-11-06 22:31:58,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (1/1) ... [2019-11-06 22:31:58,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (1/1) ... [2019-11-06 22:31:58,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (1/1) ... [2019-11-06 22:31:58,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:31:58,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:31:58,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:31:58,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:31:58,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:31:58,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:31:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:31:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:31:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:31:58,499 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:31:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:31:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:31:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:31:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:31:59,736 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:31:59,740 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:31:59,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:59 BoogieIcfgContainer [2019-11-06 22:31:59,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:31:59,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:31:59,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:31:59,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:31:59,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:57" (1/3) ... [2019-11-06 22:31:59,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554d4287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:59, skipping insertion in model container [2019-11-06 22:31:59,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:58" (2/3) ... [2019-11-06 22:31:59,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554d4287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:59, skipping insertion in model container [2019-11-06 22:31:59,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:59" (3/3) ... [2019-11-06 22:31:59,757 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label53.c [2019-11-06 22:31:59,771 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:31:59,780 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:31:59,793 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:31:59,830 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:31:59,830 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:31:59,830 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:31:59,830 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:31:59,830 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:31:59,831 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:31:59,831 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:31:59,831 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:31:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:31:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:31:59,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:59,890 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:59,892 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash 597031182, now seen corresponding path program 1 times [2019-11-06 22:31:59,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:59,908 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831853139] [2019-11-06 22:31:59,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:00,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831853139] [2019-11-06 22:32:00,315 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:00,315 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:32:00,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065350024] [2019-11-06 22:32:00,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:32:00,323 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:00,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:32:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:32:00,340 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:32:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:01,210 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:32:01,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:32:01,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-11-06 22:32:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:01,237 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:32:01,237 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:32:01,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:32:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:32:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:32:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:32:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-11-06 22:32:01,314 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 120 [2019-11-06 22:32:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:01,315 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-11-06 22:32:01,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:32:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-11-06 22:32:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:32:01,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:01,320 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:01,320 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash 330455461, now seen corresponding path program 1 times [2019-11-06 22:32:01,321 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:01,321 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952387478] [2019-11-06 22:32:01,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:01,454 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952387478] [2019-11-06 22:32:01,454 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:01,454 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:32:01,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819692308] [2019-11-06 22:32:01,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:32:01,457 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:01,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:32:01,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:32:01,457 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-11-06 22:32:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:02,184 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-11-06 22:32:02,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:32:02,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2019-11-06 22:32:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:02,190 INFO L225 Difference]: With dead ends: 703 [2019-11-06 22:32:02,191 INFO L226 Difference]: Without dead ends: 431 [2019-11-06 22:32:02,192 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:32:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-11-06 22:32:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-11-06 22:32:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-11-06 22:32:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-11-06 22:32:02,246 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 130 [2019-11-06 22:32:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:02,246 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-11-06 22:32:02,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:32:02,247 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-11-06 22:32:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:32:02,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:02,250 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:02,250 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -46995225, now seen corresponding path program 1 times [2019-11-06 22:32:02,251 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:02,251 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287428638] [2019-11-06 22:32:02,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:02,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287428638] [2019-11-06 22:32:02,611 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:02,611 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:32:02,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715863540] [2019-11-06 22:32:02,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:32:02,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:02,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:32:02,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:02,613 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 5 states. [2019-11-06 22:32:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:03,290 INFO L93 Difference]: Finished difference Result 933 states and 1337 transitions. [2019-11-06 22:32:03,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:32:03,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-11-06 22:32:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:03,297 INFO L225 Difference]: With dead ends: 933 [2019-11-06 22:32:03,297 INFO L226 Difference]: Without dead ends: 417 [2019-11-06 22:32:03,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-11-06 22:32:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2019-11-06 22:32:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-11-06 22:32:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 550 transitions. [2019-11-06 22:32:03,344 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 550 transitions. Word has length 131 [2019-11-06 22:32:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:03,345 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 550 transitions. [2019-11-06 22:32:03,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:32:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 550 transitions. [2019-11-06 22:32:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:32:03,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:03,349 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:03,349 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1746951265, now seen corresponding path program 1 times [2019-11-06 22:32:03,350 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:03,350 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357186054] [2019-11-06 22:32:03,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:03,664 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357186054] [2019-11-06 22:32:03,665 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:03,665 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:32:03,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637112322] [2019-11-06 22:32:03,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:32:03,666 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:32:03,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:03,667 INFO L87 Difference]: Start difference. First operand 417 states and 550 transitions. Second operand 5 states. [2019-11-06 22:32:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:04,293 INFO L93 Difference]: Finished difference Result 912 states and 1228 transitions. [2019-11-06 22:32:04,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:32:04,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-11-06 22:32:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:04,299 INFO L225 Difference]: With dead ends: 912 [2019-11-06 22:32:04,300 INFO L226 Difference]: Without dead ends: 417 [2019-11-06 22:32:04,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-11-06 22:32:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2019-11-06 22:32:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-11-06 22:32:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 547 transitions. [2019-11-06 22:32:04,318 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 547 transitions. Word has length 132 [2019-11-06 22:32:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:04,319 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 547 transitions. [2019-11-06 22:32:04,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:32:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 547 transitions. [2019-11-06 22:32:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 22:32:04,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:04,321 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:04,322 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:04,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1219225115, now seen corresponding path program 1 times [2019-11-06 22:32:04,322 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:04,323 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411068361] [2019-11-06 22:32:04,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:04,415 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411068361] [2019-11-06 22:32:04,415 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:04,415 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:32:04,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255542119] [2019-11-06 22:32:04,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:32:04,416 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:04,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:32:04,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:32:04,417 INFO L87 Difference]: Start difference. First operand 417 states and 547 transitions. Second operand 3 states. [2019-11-06 22:32:04,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:04,878 INFO L93 Difference]: Finished difference Result 1237 states and 1661 transitions. [2019-11-06 22:32:04,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:32:04,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2019-11-06 22:32:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:04,885 INFO L225 Difference]: With dead ends: 1237 [2019-11-06 22:32:04,885 INFO L226 Difference]: Without dead ends: 826 [2019-11-06 22:32:04,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:32:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2019-11-06 22:32:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2019-11-06 22:32:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2019-11-06 22:32:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1069 transitions. [2019-11-06 22:32:04,916 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1069 transitions. Word has length 137 [2019-11-06 22:32:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:04,917 INFO L462 AbstractCegarLoop]: Abstraction has 826 states and 1069 transitions. [2019-11-06 22:32:04,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:32:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1069 transitions. [2019-11-06 22:32:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:32:04,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:04,920 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:04,921 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1710204053, now seen corresponding path program 1 times [2019-11-06 22:32:04,921 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:04,921 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583554968] [2019-11-06 22:32:04,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:05,034 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583554968] [2019-11-06 22:32:05,034 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:05,034 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:32:05,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922841051] [2019-11-06 22:32:05,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:32:05,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:05,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:32:05,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:32:05,036 INFO L87 Difference]: Start difference. First operand 826 states and 1069 transitions. Second operand 6 states. [2019-11-06 22:32:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:05,802 INFO L93 Difference]: Finished difference Result 2375 states and 3230 transitions. [2019-11-06 22:32:05,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:32:05,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-11-06 22:32:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:05,817 INFO L225 Difference]: With dead ends: 2375 [2019-11-06 22:32:05,817 INFO L226 Difference]: Without dead ends: 1555 [2019-11-06 22:32:05,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:32:05,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2019-11-06 22:32:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1531. [2019-11-06 22:32:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1531 states. [2019-11-06 22:32:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1928 transitions. [2019-11-06 22:32:05,901 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1928 transitions. Word has length 138 [2019-11-06 22:32:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:05,902 INFO L462 AbstractCegarLoop]: Abstraction has 1531 states and 1928 transitions. [2019-11-06 22:32:05,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:32:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1928 transitions. [2019-11-06 22:32:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 22:32:05,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:05,907 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:05,907 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:05,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2034569339, now seen corresponding path program 1 times [2019-11-06 22:32:05,909 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:05,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553695172] [2019-11-06 22:32:05,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:32:06,079 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553695172] [2019-11-06 22:32:06,079 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29872349] [2019-11-06 22:32:06,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:32:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:06,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:32:06,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:32:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:06,405 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:32:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:06,514 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:32:06,515 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-11-06 22:32:06,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106820865] [2019-11-06 22:32:06,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:32:06,516 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:06,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:32:06,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:06,517 INFO L87 Difference]: Start difference. First operand 1531 states and 1928 transitions. Second operand 3 states. [2019-11-06 22:32:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:06,960 INFO L93 Difference]: Finished difference Result 3872 states and 4890 transitions. [2019-11-06 22:32:06,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:32:06,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-11-06 22:32:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:06,974 INFO L225 Difference]: With dead ends: 3872 [2019-11-06 22:32:06,974 INFO L226 Difference]: Without dead ends: 2347 [2019-11-06 22:32:06,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 293 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2019-11-06 22:32:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1803. [2019-11-06 22:32:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2019-11-06 22:32:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2259 transitions. [2019-11-06 22:32:07,062 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2259 transitions. Word has length 146 [2019-11-06 22:32:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:07,063 INFO L462 AbstractCegarLoop]: Abstraction has 1803 states and 2259 transitions. [2019-11-06 22:32:07,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:32:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2259 transitions. [2019-11-06 22:32:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:32:07,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:07,070 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:32:07,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:32:07,284 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:07,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1422723674, now seen corresponding path program 1 times [2019-11-06 22:32:07,285 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:07,285 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207385798] [2019-11-06 22:32:07,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:07,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207385798] [2019-11-06 22:32:07,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327624433] [2019-11-06 22:32:07,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:32:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:07,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:32:07,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:32:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:32:07,597 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:32:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:32:07,687 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1684655340] [2019-11-06 22:32:07,694 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 154 [2019-11-06 22:32:07,755 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:32:07,756 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)